title: Crystal structure of Mycoplasma arthritidis mitogen complexed with HLA-DR1 reveals a novel superantigen fold and a dimerized superantigen-MHC complex.
mesh_terms: D000941:Antigens; D000942:Antigens, Bacterial; D018360:Crystallography, X-Ray; D019281:Dimerization; D015798:HLA-DR1 Antigen / Q000737:chemistry*; D008285:Major Histocompatibility Complex / Q000502:physiology; D008934:Mitogens / Q000737:chemistry*; D008958:Models, Molecular; D045645:Mycoplasma arthritidis / Q000378:metabolism*; D017510:Protein Folding; D017434:Protein Structure, Tertiary; D011506:Proteins; D018089:Superantigens / Q000737:chemistry
chemical_list: D000941:Antigens; D000942:Antigens, Bacterial; D015798:HLA-DR1 Antigen; D008934:Mitogens; C052996:Mycoplasma arthritidis mitogen; D011506:Proteins; D018089:Superantigens